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Forum: 64-65 GTO Tempest & LeMans TECH 09-26-2021, 04:00 PM
Replies: 21
Views: 2,242
Posted By Kenth
If you want to know what is going on with vacuum...

If you want to know what is going on with vacuum advance at all rpmīs and driving situation just connect a vacuum gauge to the intake at a full manifold source via a long hose so you can watch wile...
Forum: 64-65 GTO Tempest & LeMans TECH 09-26-2021, 03:58 AM
Replies: 21
Views: 2,242
Posted By Kenth
The ignition vacuum advance is an engine load...

The ignition vacuum advance is an engine load ignition regulator/sensor.
At 4600 rpmīs you may have the pedal to the metal (WOT). High load on engine means low vacuum signal in intake and no vacuum...
Forum: 64-65 GTO Tempest & LeMans TECH 09-25-2021, 02:55 AM
Replies: 21
Views: 2,242
Posted By Kenth
1965 GTO uses #1111054 distributor. Initial...

1965 GTO uses #1111054 distributor.
Initial timing is 6° BTDC.
Centrufugal advance starts with 1-5°@900 rpmīs, 14-18°@2000 rpmīs and max 20-24°@4600 rpmīs.
Vacuum advance #1116172 starts@8-10...
Forum: 64-65 GTO Tempest & LeMans TECH 09-24-2021, 04:02 PM
Replies: 21
Views: 2,242
Posted By Kenth
Carter 3898S is from a 1965 421 A/T engine. ...

Carter 3898S is from a 1965 421 A/T engine.

NO 1965 Pontiac Carter AFB has a vacuum spark port. Spark passage is open to manifold vacuum.

For 1966-67 ONLY Carter AFBīs using A.I.R. uses a...
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